Drinking straw



FIG. 1 is a front elevational view of a drinking straw showing our new design, the rear elevational view being identical;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof; and,

FIG. 4 is a right side elevational view thereof, the left side elevational view being identical. 

The ornamental design for a drinking straw, as shown and described. 